Groupon offers the refurbished 4th-generation Apple iPod touch 16GB MP3 Player in Black, model no. ME178LL/A, or White, model no. ME179LL/A, for $159.99 with free shipping. That's $15 under the lowest total price we could find for factory-sealed units now; however, we saw new versions for $10 less two weeks ago. It features a high-definition Retina display, 3-axis gyro, iOS 5, front- and rear-facing cameras (the latter capable of HD recording), FaceTime, Game Center, and more. Deal ends July 18 at 1 am ET. A 90-day MPC warranty applies.